"a work, composition," especially a musical one, 1809, from Latin opus "a work, labor, exertion" (source of Italian opera, French oeuvre, Spanish obra), from PIE root *op- (1) "to work, produce in abundance" (Germanic *ob-) "to work, produce in abundance," originally of agriculture later extended to religious acts (cognates: Sanskrit apas- "work, religious act;" Avestan hvapah- "good deed;" Old High German uoben "to start work, to practice, to honor;" German üben "to exercise, practice;" Dutch oefenen, Old Norse ?fa, Danish ?ve "to exercise, practice;" Old English ?fnan "to perform, work, do," afol "power"). The plural, seldom used as such, is opera.
例文
1. The violinist played his own opus No.16.
このバイオリニストは彼自身の16番の楽曲を演奏している。
2.The violinist played his own opus ，No.16.
このバイオリニストは彼自身の16番の楽曲を演奏している。
3.The Pleasures of Childhood：Aria，Minuetto，Valse，and Marcia， Opus I，by Jean-Christophe Krafft.
は、ジョン?クリシュドルフ?クラフト作品第1号、子供時代の遣興：アリア、ステップ、円舞曲、行進曲。
4.Why are some media referring to Opus Dei as ''God 's mafia '？
なぜ一部のメディアは鄒山修隠を神のマフィアと呼ぶのか？
5.It can 't fill in the indivedual study to Wu Mingshi 's opus .